TSA5523M - Philips

TSA5523M 1.4 GHz I2C-bus controlled multimedia synthesizer

The device is a single chip PLL frequency synthesizer designed for TV and VCR tuning systems. The circuit consists of a divide-by-eight prescaler with its own preamplifier, a 15-bit programmable divider, a crystal oscillator and its programmable reference divider, a phase/frequency detector combined with a charge-pump which drives the tuning amplifier, inclu.

Features

• Complete 1.4 GHz single-chip system
• Adaptive DC/DC converter driver output
• On-board tuning amplifier output
• Varicap drive disable
• Four NPN open-collector output ports (10 mA)
• Four bus-controlled bidirectional ports (NPN open-collector outputs)
• In-lock detector
• 5-step Analog-to-Digital Converter (ADC)
• Mixer/Oscillator (M/O) band-switch output
• 15-bit programmable divider
• Programmable reference divider ratio (512, 640 or 1024)
• Programmable charge-pump current (50 or 250 µA)
• I2C-bus format
  – Address plus four data bytes transmission (write mode)
  – Address plus one status .